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Questions and Answers
What is the primary aim of determining the bleeding time of a patient?
What is the primary aim of determining the bleeding time of a patient?
What is being evaluated through the bleeding time test?
What is being evaluated through the bleeding time test?
What is not a purpose of determining the bleeding time of a patient?
What is not a purpose of determining the bleeding time of a patient?
What is an indirect assessment of through the bleeding time test?
What is an indirect assessment of through the bleeding time test?
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Why is the bleeding time test important?
Why is the bleeding time test important?
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What is the conversion rate of spots to minutes in Ivy's method?
What is the conversion rate of spots to minutes in Ivy's method?
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What is the initial pressure raised to in the BP apparatus during Ivy's method?
What is the initial pressure raised to in the BP apparatus during Ivy's method?
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What part of the body is the cuff of the BP apparatus applied to during Ivy's method?
What part of the body is the cuff of the BP apparatus applied to during Ivy's method?
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What is the purpose of raising the pressure in the BP apparatus during Ivy's method?
What is the purpose of raising the pressure in the BP apparatus during Ivy's method?
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What is the final step in Ivy's method after applying the cuff and raising the pressure?
What is the final step in Ivy's method after applying the cuff and raising the pressure?
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What is the first step in the bleeding time test?
What is the first step in the bleeding time test?
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How often should the blood be wiped with a filter paper during the bleeding time test?
How often should the blood be wiped with a filter paper during the bleeding time test?
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What is the indication to stop the stopwatch during the bleeding time test?
What is the indication to stop the stopwatch during the bleeding time test?
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What is the purpose of puncturing the lower part of the earlobe or fingertip?
What is the purpose of puncturing the lower part of the earlobe or fingertip?
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What is the final step in the bleeding time test?
What is the final step in the bleeding time test?
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What is the normal bleeding time by the method described?
What is the normal bleeding time by the method described?
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What is usually found when the platelet count is below 50,000/μL?
What is usually found when the platelet count is below 50,000/μL?
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What is the clotting time?
What is the clotting time?
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What is the main purpose of the clotting time test?
What is the main purpose of the clotting time test?
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What is the material used in the clotting time test?
What is the material used in the clotting time test?
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What is the method of pricking the finger in the capillary tube method?
What is the method of pricking the finger in the capillary tube method?
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What is the purpose of starting the stop watch in the capillary tube method?
What is the purpose of starting the stop watch in the capillary tube method?
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What is observed after one minute of starting the stop watch in the capillary tube method?
What is observed after one minute of starting the stop watch in the capillary tube method?
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What is a condition where bleeding time is normal, but clotting time is prolonged?
What is a condition where bleeding time is normal, but clotting time is prolonged?
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Which of the following conditions can lead to prolonged clotting time?
Which of the following conditions can lead to prolonged clotting time?
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What is a possible cause of prolonged clotting time in a patient?
What is a possible cause of prolonged clotting time in a patient?
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A patient is on anticoagulant therapy. What can be expected?
A patient is on anticoagulant therapy. What can be expected?
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Which of the following is NOT a cause of prolonged clotting time?
Which of the following is NOT a cause of prolonged clotting time?
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Study Notes
Bleeding Time Test
- Aim: to determine bleeding time to assess platelet function and body's ability to stop blood flow
- Steps:
- Prick the lower part of the earlobe (or fingertip) with a lancet, making a 3-4 mm deep incision
- Start the stopwatch and wipe the blood every 30 seconds with a filter paper without squeezing
- Stop the stopwatch when blood fails to appear on the filter paper
- Count the spots of blood on the filter paper (each 2 spots = 1 minute)
- Record the result and calculate the bleeding time
Ivy's Method
- Applied to the upper arm, with pressure raised to 40 mm Hg
- Normal bleeding time: up to 9 minutes
- Used on the front of the forearm
Prolonged Bleeding Time
- Found when:
- Platelet count is below 50,000/μL
- There is platelet dysfunction
Clotting Time
- Definition: time interval from oozing of blood after a cut or injury to formation of clot
- Normal clotting time: 2-8 minutes
- Aim: to determine the clotting time of a subject
Clotting Time Test
- Materials:
- Fine capillary glass tubes (about 10 mm length)
- Lancet
- Stop watch
- Cotton and 70% alcohol
- Two methods:
- Glass Container Method (Lee and White Method)
- Capillary Tube Method
Capillary Tube Method
- Steps:
- Clean the finger with 70% alcohol and allow to dry
- Prick the finger by lancet
- Draw blood up in the capillary glass tube
- Start the stop watch
- Break small pieces of the capillary tube every 30 seconds until a fibrin thread is seen between the two broken ends
Conditions of Prolonged Clotting Time
- Found in:
- Hemophilia (bleeding time is normal)
- Vitamin K deficiency
- Liver disease
- Anticoagulant therapy
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Description
A medical test to assess platelet function and the body's ability to stop blood flow, involving a lancet incision and measuring bleeding time.
